﻿/*******************************************************************************************
 * Copyright (c) 2006-2009 Alex Robson, Rob Simmons, Craig Israel, and Rachel Twyford
 *
 * Use of this software in any form requires that you have both 
 * read and agreed to the following terms:
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation 
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions: 
 *
 * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, 
 * this list of conditions and the following disclaimer in the 
 * documentation and/or other materials provided with the distribution.
 * Neither the name of Nvigorate nor the names of its contributors may 
 * be used to endorse or promote products derived from this software without 
 * specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL ANY CONTRIBUTOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ****************************************************************************************/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.Text;
using PostSharp.Extensibility;
using PostSharp.Laos;

namespace Nvigorate.Aspect
{
    [Serializable]
    [MulticastAttributeUsage(MulticastTargets.Class)]
    public class IdentityAspect : CompositionAspect
    {
        public IdentityAspect()
        {
        }

        public override object CreateImplementationObject(InstanceBoundLaosEventArgs eventArgs)
        {
            return new InstanceIdentifier();
        }

        public override Type GetPublicInterface(Type containerType)
        {
            return typeof (IIdentifiable);
        }

        public override CompositionAspectOptions GetOptions()
        {
            return
                CompositionAspectOptions.IgnoreIfAlreadyImplemented |
                CompositionAspectOptions.GenerateImplementationAccessor;
        }

        
    }

    [DataContract]
    [Serializable]
    public class InstanceIdentifier : IIdentifiable
    {
        [DataMember]
        private Guid _instanceId;

        public Guid InstanceId
        {
            get
            {
                return _instanceId;
            }
        }

        public InstanceIdentifier()
        {
            _instanceId = Guid.NewGuid();
        }
    }

    public interface IIdentifiable
    {
        Guid InstanceId { get; }
    }
}
